编译错误:您提交的代码无法完成编译 /usr/bin/../lib/gcc/x86_64-linux-gnu/5.4.0/../../../x86_64-linux-gnu/crt1.o: In function `_start': (.text+0x20): undefined reference to `main' clang++: error: linker command failed with exit code 1 (use -v to see invocation)